Rainy Season is a mix of bright sunshine and heat alternating with cool, overcast, wet weather. In Mulanje where I live there is also a fair bit of mugginess thrown in as well. Often all of these occur in the same day, which is why I try to always carry my umbrella with me this time of year. You never know when a downpour will sneak up on you!
Rainy Season brings out the big bugs. I caught a big black millipede in my bedroom a couple days ago, and there is another giant snail next to the chim. They have the coolest shells. I posted a pic of these last year if you want to see them.
About a week ago I saw this huge caterpillar next to the bafa. That is a matchbox next to it for scale. I like how it looks like it has a dark halo around it.